{
  "manageEntity": {
    "action": "Save",
    "entityId": "1031759599",
    "entityType": "Track",
    "nonce": "0xd05bb95cf4b4d420e003a68b1d38c6427865f4ea86714949fda89050a3f311e3",
    "signature": "0x38fe4298c5504efeafee648385506d0bad9f6158e234ebd13cf2a28deab2c180394fe70f47d0089740c4e813e84d7b8077ed10152049cc3f42d4269a37b6a7331c",
    "signer": "0x19EDB4c1a8740c323f6e57B80F3422C01875289e",
    "userId": "390804"
  }
}